Knee brace



FIG. 1 is a perspective view of a knee brace showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view thereof shown in condition of use attachedto the user's leg.

The broken lines showing a human leg illustrate environmental structureof the knee brace which form no part of the claimed design.

The ornamental design for a knee brace, as shown and described. 